Title:Nanostructured Lipid Carrier-loaded In Situ Gel for Ophthalmic Drug Delivery: Preparation and In Vitro Characterization Studies
Volume: 13
Issue: 1
Author(s): Vidya Sabale*, Vaishnavi Belokar, Manasi Jiwankar and Prafulla Sabale
Affiliation:
- Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, 440 037, Maharashtra, India
Keywords:
Ophthalmic, loratadine, NLC, microemulsion, gel, drug delivery.
Abstract:
Background: Nanostructured lipid carriers (NLCs) are explored as vehicles for ophthalmic
drug delivery owing to their better drug loading, good permeation, and satisfactory safety profile.
Objectives: The purpose of the study was to fabricate and characterize an in situ ocular gel of loratadine
as a model drug based on NLCs to enhance the drug residence time.
Methods: NLCs were fabricated using the microemulsion method in which solid lipid as Compritol
888 ATO, lipid as oleic acid, surfactant as Tween 80, and isopropyl alcohol as co-surfactant as alcohol
were used. Based on the evaluation of formulation batches of NLCs, the optimized batch was selected
and further utilized for the formulation of in situ gel containing Carbopol 934 and HPMC
K15M as gelling agents, and characterized
Results: The optimized NLCs of loratadine exhibited entrapment efficiency of 83.13 ± 0.13% and an
average particle size of 18.98 ± 1.22 nm. Drug content and drug release were found to be 98.67 and
92.48%, respectively. Excellent rheology and mucoadhesion were demonstrated by the loratadine
NLC-loaded in situ gel to enhance its attachment to the mucosa. NLC-based in situ ocular gel showed
the desired results for topical administration. The prepared gel was observed to be non-irritating to
the eye.
Conclusion: The optimized NLC-based in situ gel formulation presented better corneal retention and
it was found to be stable, offering sustained release of the drug. Thus, the joined system of sol-gel
was found promising for ophthalmic drug delivery.